What is the surface of a triangular prism 1 cm 1 cm 1.2 cm 1.2 cm 0.8 cm
1 answer:
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Answer:
- 819
Step-by-step explanation:
The sum to n terms of a geometric series is
=
where a is the first term and r the common ratio
Here a = 1 and r = - 4 ÷ 1 = - 4, thus
=
=
=
= - 819